What effects can excessive pressure at the top of a distillation tower have on the plant?

Pressure is a qualitative parameter of a product; it determines the boiling point of the oil. Under the same temperature and composition conditions, it influences the vaporization rate of the oil, having a direct impact on the operation of the entire tower. As the pressure in the distillation tower increases, the boiling point of the oil products rises, the vaporization rate decreases, the amount of gas phase inside the tower diminishes, and it becomes more difficult to separate the different components. To maintain effective separation, more heat is required. An increase in the tower pressure also raises the partial pressures of oil and gas, which can result in incomplete separation of the oil products; as a result, many light components fail to be separated from the heavier ones. Excessively high tower pressure can also cause the safety valve at the top of the tower to activate

The higher the pressure, the less light components rise to the top, resulting in an unreasonable product distribution! This can cause the safety valve to activate; if there is a problem with the pressure setting of the safety valve, it may also lead to the tower toppling over.

Large fluctuations in the pressure at the top of the tower can cause an imbalance between the gas and liquid phases, resulting in substandard product. If the pressure is too high, the safety valve will activate, triggering an emergency response.

Tower pressure fluctuations lead to unstable operation and the activation of the high-pressure safety valve.

Excessively high head pressure reduces the precision of product separation, increases the pressure on cooling systems such as air coolers. Moreover, to lower this temperature, it is necessary to increase the reflux volume; since this reflux consists of light components, this creates a vicious cycle. Needless to say, the product will then be of poor quality. If the safety valve at the top of the tower functions properly, it will operate as intended; otherwise, serious accidents can occur. Changes in relative volatility depend on many factors – it is necessary to consider whether there are any changes in other conditions or parameters, and what those changes are. Generally, when we encounter this problem, our first thought is to use cooling and reflux to lower the temperature of the furnace, but this is only appropriate under normal circumstances. If nothing else works, then more drastic measures must be considered, such as reducing the temperature or the flow rate. Usually, increasing the amount of reflux and enhancing the cooling capacity can help control the situation. The volatility of light components decreases, while the pressure remains high, resulting in an unchanged saturated vapor pressure. The higher the pressure, the greater the likelihood that it will approach the saturated vapor pressure, thereby reducing volatility

Excessive pressure reduces the light component recovery of the entire system; when the pressure is too high at equilibrium between the vapor and liquid phases, it indicates that the partial pressure of the vapor phase is high, making it difficult for the light components in the liquid phase to evaporate. This results in a lower quality of the product, which is why the volatility of the light components decreases.

In fact, it not only affects the fractionation tower; more importantly, it causes excessive pressure in the settler, poor fluidization of the catalyst, and increases the power required to convey the main air, thereby raising energy consumption.

An excessively high pressure at the top of the distillation tower means that the overall system pressure is too high, primarily due to high reaction pressure. It’s not clear what the operator did in this case; high reaction pressure disrupts the pressure balance, preventing the catalyst from flowing properly and thus affecting normal operation, which has a significant impact on the entire facility.

If the distillation pressure is high, then the pressure in the reaction settler will also be high; just make sure there isn’t a negative pressure difference between the two vessels. This causes the catalyst to stop flowing and the main fan to surge, among other issues. . A high distillation pressure results in a high dry point for the crude gasoline, as well as a high 95-degree diesel point, leading to substandard product quality. The level of the oil slurry will also rise; be sure not to block the oil and gas inlet, otherwise the consequences could be disastrous. There is also high pressure, and safety valves are prone to failure. The reaction temperature must be well controlled; otherwise, a low-temperature alarm will trigger, shutting off the feed.

In simple terms, a high fractional distillation pressure can affect the reaction unit as well as the compressor

What effects can excessive pressure at the top of a distillation tower have on the plant? ⒈The safety valve at the top of the distillation tower activated, which constitutes a safety incident ； ⒉Impact on the feed to the fractionation tower ； ⒊With the same feed, there is no need to increase the energy consumption of the equipment unnecessarily in order to ensure product quality.

Excessively high distillation pressure has a significant impact on both the product and the reaction process

Large fluctuations in the pressure at the top of the tower not only cause problems for the tower itself but also lead to issues in both the reaction system and the compressor system.

It will have irreversible effects on the quality of the product as well as the equipment~~~ Try to avoid doing this, as it also increases the risk; explosion-proof measures must be in place~~~

High pressure in the distillation tower: 1. High reaction pressure reduces the efficiency of catalyst fluidization, which has a significant impact on the production of the entire plant. 2. Due to the high pressure, the control temperatures at various points increase, making it difficult to determine new optimal values; this can lead to products that do not meet quality standards. High pressure also reduces the relative volatility of the two components

The higher the pressure, the less light components rise to the top; the reaction pressure is high

Excessively high pressure at the top of the distillation tower will lighten the side-stream oil, reducing the yield of products.

The higher the pressure, the more light components are at the bottom of the tower

To ensure the product meets quality standards, the pressure P and temperature T at the top of the distillation tower should be proportional to each other; always keep in mind which pressure corresponds to which temperature

It should be said that the impact on reactions and the crew deserves special consideration